1、 Standard ECMA-221 3rd Edition - December 2001 Standardizing Information and Communication Systems Private Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol - Call Interception Additional Network Feature Phone: +41 22 849.60.00 - Fax: +41 22 849.60.01 - URL: http:/www.ecma.ch -
2、 Internet: helpdeskecma.ch . Standard ECMA-221 3rd Edition - December 2001 Standardizing Information and Communication Systems Private Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol - Call Interception Additional Network Feature (QSIG-CINT) Phone: +41 22 849.60.00 - Fax: +41
3、 22 849.60.01 - URL: http:/www.ecma.ch - Internet: helpdeskecma.ch IW Ecma-221.doc 31-01-02 12,03 . Brief History This Standard is one of a series of ECMA Standards defining services and signalling protocols applicable to Private Integrated Services Networks (PISNs). The series uses ISDN concepts as
4、 developed by ITU-T and conforms to the framework of International Standards for Open Systems Interconnection as defined by ISO/IEC. This particular Standard specifies the signalling protocol for use at the Q reference point in support of the Call Interception additional network feature. The protoco
5、l defined in this Standard forms part of the PSS1 protocol (informally known as QSIG). This Standard is based upon the practical experience of ECMA member companies and the results of their active and continuous participation in the work of ISO/IEC JTC1, ITU-T, ETSI and other international and natio
6、nal standardization bodies. It represents a pragmatic and widely based consensus. Compared to the 1st Edition of Standard ECMA-221 (published by ECMA in March 1995), the 2nd Edition incorporated changes in order to achieve complete alignment with International Standard ISO/IEC 15054:1997(E) publishe
7、d by ISO/IEC in May 1997. Compared to the 2nd Edition of Standard ECMA-221 (published by ECMA in June 1997), this 3rd Edition incorporates migration to ASN.1 version 1997. Adopted as 3rd Edition of Standard ECMA-221 by the General Assembly of December 2001. - i - Table of contents 1 Scope 1 2 Confor
8、mance 1 3 References (normative) 1 4 Definitions 2 4.1 External definitions 2 4.2 Other definitions 3 4.2.1 Forward switching 3 4.2.2 Intercepting PINX 3 4.2.3 Intercepted-to PINX 3 4.2.4 Intercepted-to user 3 4.2.5 Interception immediate 3 4.2.6 Interception delayed 3 4.2.7 Call failure 3 4.2.8 Wai
9、ting on busy 3 5 List of acronyms 3 6 Signalling protocol for the support of ANF-CINT 3 6.1 ANF-CINT description 3 6.2 ANF-CINT operational requirements 4 6.2.1 Requirements on an Originating PINX 4 6.2.2 Requirements on a Terminating PINX 4 6.2.3 Requirements on an Intercepted-to PINX 4 6.2.4 Requi
10、rements on a Transit PINX 4 6.2.5 Requirements on an Intercepting PINX 4 6.3 ANF-CINT coding requirements 5 6.3.1 Operations 5 6.3.2 Information elements 8 6.3.3 Messages 8 6.4 ANF-CINT state definitions 8 6.4.1 States at the Originating PINX 8 6.4.2 States at the Intercepting PINX 8 6.4.3 States at
11、 the Intercepted-to PINX 8 6.4.4 States at a Transit PINX 8 6.4.5 States at the Terminating PINX 9 6.5 ANF-CINT Signalling procedures for activation, deactivation, registration and interrogation 9 6.6 ANF-CINT Signalling procedures for invocation and operation 9 6.6.1 Actions at a Terminating PINX 9
12、 6.6.2 Actions at a Transit PINX 9 6.6.3 Actions at the Originating PINX 9 - ii - 6.6.4 Actions at an Intercepting PINX for interception immediate 10 6.6.5 Actions at an Intercepting PINX for interception delayed 11 6.6.6 Actions at an Intercepted-to PINX 13 6.7 ANF-CINT Impact of interworking with
13、a public ISDN 13 6.7.1 Incoming Gateway PINX 13 6.7.2 Outgoing Gateway PINX 13 6.8 ANF-CINT Impact of interworking with a non-ISDN 13 6.8.1 Incoming Gateway PINX 13 6.8.2 Outgoing Gateway PINX 13 6.9 Protocol interaction between ANF-CINT and other supplementary services and ANFs 14 6.9.1 Interaction
14、 with Calling Name Identification Presentation (SS-CNIP) 14 6.9.2 Interaction with Connected Name Identification Presentation (SS-CONP) 14 6.9.3 Interaction with Call Forwarding Unconditional (SS-CFU) 14 6.9.4 Interaction with Call Forwarding Busy (SS-CFB) 15 6.9.5 Interaction with Call Forwarding N
15、o Reply (SS-CFNR) 15 6.9.6 Interaction with Do Not Disturb (SS-DND) 15 6.9.7 Interaction with Do Not Disturb Override (SS-DNDO) 15 6.9.8 Interaction with Call Completion To Busy Subscriber (SS-CCBS) 15 6.9.9 Interaction with Call Completion On No Reply (SS-CCNR) 15 6.9.10 Interaction with Call Offer
16、 (SS-CO) 16 6.9.11 Interaction with Call Intrusion (SS-CI) 16 6.9.12 Interaction with Call Transfer (SS-CT) 16 6.9.13 Interaction with Path Replacement (ANF-PR) 17 6.9.14 Interaction with Recall (SS-RE) 17 6.9.15 Interaction with Advice Of Charge (SS-AOC) 17 Annex A - Protocol Implementation Conform
17、ance Statement (PICS) proforma 19 Annex B - Examples of message sequences 31 Annex C - Specification and Description Language (SDL) Representation of procedures 37 Annex D - ASN.1 definitions according to ITU-T Recs. X.208 / X.209 43 1 Scope This Standard specifies the signalling protocol for the su
18、pport of the additional network feature Call Interception (ANF-CINT) at the Q reference point between Private Integrated services Network eXchanges (PINX) connected together within a Private Integrated Services Network (PISN). ANF-CINT is an additional network feature which enables calls that cannot
19、 be completed due to certain conditions to be redirected to a predetermined intercepted-to user. The Q reference point is defined in ECMA-133. Service specifications are produced in three stages and according to the method specified in ETS 300 387. This Standard contains the stage 3 specification fo
20、r the Q reference point and satisfies the requirements identified by the stage 1 and stage 2 specifications in ECMA-220. The signalling protocol for ANF-CINT operates on top of the signalling protocol for basic circuit switched call control, as specified in ECMA-143, and uses certain aspects of the
21、generic procedures for the control of supplementary services specified in ECMA-165. This Standard also specifies additional signalling protocol requirements for the support of interactions at the Q reference point between ANF-CINT and other supplementary services and ANFs. NOTE Additional interactio
22、ns that have no impact on the signalling protocol at the Q reference point can be found in the relevant stage 1 specifications. This Standard is applicable to PINXs which can interconnect to form a PISN. 2 Conformance In order to conform to this Standard, a PINX shall satisfy the requirements identi
23、fied in the Protocol Implementation Conformance Statement (PICS) proforma in annex A. Conformance to this Standard includes conforming to those clauses that specify protocol interactions between ANF-CINT and other supplementary services and ANFs for which signalling protocols at the Q reference poin
24、t are supported in accordance with the stage 3 standards concerned. 3 References (normative) The following standards contain provisions which, through reference in this text, constitute provisions of this Standard. All standards are subject to revision, and parties to agreements based on this Standa
25、rd are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. In the case of references to ECMA Standards that are aligned with ISO/IEC International Standards, the number of the appropriate ISO/IEC International Standard is given in brackets
26、 after the ECMA reference. ECMA-133 Private Integrated Services Network (PISN) - Reference Configuration for PISN Exchanges (PINX) (International Standard ISO/IEC 11579-1) ECMA-142 Private Integrated Services Network (PISN) - Circuit-mode 64 kbit/s Bearer Services - Service Description, Functional C
27、apabilities and Information Flows (International Standard ISO/IEC 11574) ECMA-143 Private Integrated Services Network (PISN) - Circuit-mode Bearer Services - Inter-Exchange Signalling Procedures and Protocol (International Standard ISO/IEC 11572) ECMA-164 Private Integrated Services Network (PISN) -
28、 Inter-Exchange Signalling Protocol - Name Identification Supplementary Services (International Standard ISO/IEC 13868) ECMA-165 Private Integrated Services Network (PISN) - Generic Functional Protocol for the Support of Supplementary Services - Inter-Exchange Signalling Procedures and Protocol (Int
29、ernational Standard ISO/IEC 11582) - 2 - ECMA-174 Private Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol - Call Diversion Supplementary Services (International Standard ISO/IEC 13873) ECMA-178 Private Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol -
30、Call Transfer Supplementary Services (International Standard ISO/IEC 13869) ECMA-186 Private Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol - Call Completion Supplementary Services (International Standard ISO/IEC 13870) ECMA-212 Private Integrated Services Network (PISN) - I
31、nter-Exchange Signalling Protocol - Advice of Charge Supplementary Services (International Standard ISO/IEC 15050) ECMA-214 Private Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol - Recall Supplementary Service (International Standard ISO/IEC 15052) ECMA-220 Private Integrate
32、d Services Network (PISN) - Specification, Functional Model and Information Flows - Call Interception Additional Network Feature (International Standard ISO/IEC 15053) ETS 300 387 Private Telecommunication Network (PTN); Method for the specification of basic and supplementary services (1994) ITU-T R
33、ec. I.112 Vocabulary of terms for ISDNs (1993) ITU-T Rec. I.210 Principles of telecommunication services supported by an ISDN and the means to describe them (1993) ITU-T Rec. Z.100 Specification and description language (1999) 4 Definitions For the purposes of this Standard, the following definition
34、s apply. 4.1 External definitions This Standard uses the following terms defined in other documents: Application Protocol Data Unit (APDU) (ECMA-165) Basic Service (ITU-T Rec. I.210) Call, Basic Call (ECMA-165) End PINX (ECMA-165) Incoming Gateway PINX (ECMA-143) Outgoing Gateway PINX (ECMA-143) Ori
35、ginating PINX (ECMA-143) Preceding PINX (ECMA-143) Private Integrated Services Network (PISN) (ECMA-133) Private Integrated services Network eXchange (PINX) (ECMA-133) Signalling (ITU-T Rec. I.112) Subsequent PINX (ECMA-143) Supplementary Service (ITU-T Rec. I.210) Supplementary Service Control Enti
36、ty (ECMA-165) Terminating PINX (ECMA-143) Transit PINX (ECMA-143) User (ECMA-142) - 3 - 4.2 Other definitions 4.2.1 Forward switching Network routeing algorithm which performs the interception by joining together the first connection from the calling user to the Intercepting PINX and the new connect
37、ion from the Intercepting PINX to the intercepted-to user. 4.2.2 Intercepting PINX The PINX where the interception is invoked. 4.2.3 Intercepted-to PINX The PINX serving the intercepted-to user. 4.2.4 Intercepted-to user The user to whom the intercepted call is directed. 4.2.5 Interception immediate
38、 The redirection of a call to an alternative destination as a result of detecting a call failure condition that prevents the call reaching an alerting or waiting on busy state. 4.2.6 Interception delayed The redirection of a call to an alternative destination as a result of remaining too long in an
39、alerting or waiting on busy state. 4.2.7 Call failure In the context of a particular PINX, the inability to route a call or, having routed a call, the receipt of a call clearing message from the Subsequent PINX without the call having reached an alerting or waiting on busy state. 4.2.8 Waiting on bu
40、sy A call state in which a call is awaiting answer at a user that is busy on another call. NOTE This can arise, for example, as a result of the use of supplementary service Call Offer (SS-CO) during call establishment. A call that is waiting on busy can be transferred. 5 List of acronyms ANF Additio
41、nal Network Feature APDU Application Protocol Data Unit ASN.1 Abstract Syntax Notation no. 1 CINT Call Interception ISDN Integrated Services Digital Network NFE Network Facility Extension PICS Protocol Implementation Conformance Statement PINX Private Integrated services Network eXchange PISN Privat
42、e Integrated Services Network SDL Specification and Description Language SS Supplementary Services 6 Signalling protocol for the support of ANF-CINT 6.1 ANF-CINT description ANF-CINT is invoked for an unanswered or unsuccessful call, allowing the call to be routed to a special destination in the PIS
43、N. The special destination may be dependant of the interception cause. - 4 - The conditions leading to invocation of ANF-CINT are considered as implementation options. Examples of factors that can be taken in to account are: the source of the call (e.g. the geographic location of the calling user, t
44、he network from which the call has entered the PISN); the particular interception cause; the type of connection (e.g. the originating user is an attendant); the call destination; time of the day. 6.2 ANF-CINT operational requirements 6.2.1 Requirements on an Originating PINX Call establishment proce
45、dures for the outgoing side of an inter-PINX link and call release procedures, as specified in ECMA-143, shall apply. Generic procedures for the call-related control of supplementary services, as specified in ECMA-165 for an End PINX, shall apply. 6.2.2 Requirements on a Terminating PINX Call establ
46、ishment procedures for the incoming side of an inter-PINX link and call release procedures, as specified in ECMA-143, shall apply. Generic procedures for the call-related control of supplementary services, as specified in ECMA-165 for an End PINX, shall apply. 6.2.3 Requirements on an Intercepted-to
47、 PINX Call establishment procedures for the incoming side of an inter-PINX link and call release procedures, as specified in ECMA-143, shall apply. Generic procedures for the call-related control of supplementary services, as specified in ECMA-165 for an End PINX, shall apply. 6.2.4 Requirements on
48、a Transit PINX Basic call procedures for call establishment and call clearing at a Transit PINX, as specified in ECMA-143, shall apply. Generic procedures for the call-related control of supplementary services, as specified in ECMA-165 for a Transit PINX, shall apply. 6.2.5 Requirements on an Interc
49、epting PINX Call establishment procedures for the outgoing side of an inter-PINX link and call release procedures, as specified in ECMA-143, shall apply. Generic procedures for the call-related control of supplementary services, as specified in ECMA-165 for an End PINX, shall apply. Where, as a result of invocation of ANF-CINT, an Intercepting PINX can become a Transit PINX, generic procedures for the call-related control of supplementary services, as specified in ECMA-165 for a Transit PINX, shall apply. - 5 - 6.3 ANF-CINT coding requirements
